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Finding the Fourth Proportional to 756.64, 1,135.06 and 269.58

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Solution

The fourth proportional to 756.64, 1,135.06 and 269.58 is: 404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.64 : 1,135.06 = 269.58 : x
  2. Step 2: Convert to fraction form
    756.64/1,135.06 = 269.58/x
  3. Step 3: Cross multiply
    756.64x = 1,135.06 × 269.58
  4. Step 4: Simplify right side
    756.64x = 305,988.19
  5. Step 5: Solve for x
    x = 305,988.19/756.64
  6. Step 6: Final answer
    x = 404.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.